DE102016103577B4 - Optical network entity and fiber-optic connection module - Google Patents

Abstract

An optical network entity (301) for receiving an optical signal (302), comprising:
a plurality of fiber access modules (310, 320, 330) for converting a plurality of optical signals (304) into electrical signals (308, 318); and
a control module (303),
wherein each fiber termination module (310, 320, 330) includes a predistorter (311) for predistorting the electrical signal (308, 318) to compensate for channel crosstalk,
wherein each optical fiber connection module (310, 320, 330) is connectable to the optical network entity (301) via electrical contacts,
wherein the control module (303) is adapted to detect the fiber termination module (310, 320, 330) in response to an electrical connection of a fiber termination module (310, 320, 330) to the optical network entity (301) and to the detected fiber termination module (310, 320, 330) predistortion coefficients (306), and
wherein the predistorter (311) is adapted to predistort the electrical signal (308, 318) by means of the transmitted predistortion coefficients (306).

Description

The present invention relates to an optical network entity for receiving an optical signal, comprising a plurality of fiber-optic connection modules with predistorters for compensating channel crosstalk. The invention further relates to a single fiber connection module and a communication system having an optical network entity and / or a fiber connection module. In particular, the invention relates to a fiber optic connector module with central vectoring control.

According to the current state of the art, Distribution Point Units (DPU) are used at both FTTB and FTTdp sites. The number of ports varies between 1 and 16 ports. These ports can be equipped with G.Fast or VDSL. Usually, vectoring is used as a method in an Access Node, which the DPU represents to eliminate the mutual port interference. G.Fast is an ITU-T standard specified in the specification. G.9701: "Fast access to user terminals (FAST) - physical layer specification" is described in more detail.

The procedure is defined in different forms: Board Level, System Level, Domain Level. According to the standards BBF TR-301 "DPU Architecture and Requirements for Fiber to the Distribution Point" and WT-355 "Data Model for DPU" consists of a DPU from the DSL interfaces, PON interfaces, the RPF function (Reverse Power Feeding ) as well as Layer 2 switching functions. R-12 explicitly states that vectoring is not required for a single customer (single port DPU). This statement is valid as long as it is a DPU with a DSL port in a line.

1 shows a schematic representation of the topology of a broadband access network 100 according to ITU-T G.9701. An OLT (Optical Line Termination Entity) 103 is coupled via a standard defined V interface by means of an aggregation network 102 to a BRAS / BNG (Broadband Radio Access System) 101, for example IP addresses and / or or access to the aggregation network 102. An optical network unit entity (ONU / ONT) 104 is coupled via an R / S and an S / R interface to the OLT optical termination entity 103. A stationary gateway (RG) is coupled via a U-interface to the ONU / ONT or optical network entity 104. On the subscriber side there is the T-interface.

A migration from G.Fast to FTTH results in two options: First, a complete replacement of all DSL ports under forced migration of all customers at the same time; on the other hand, a port-wise switching while maintaining unused ports. Furthermore, multiple DPUs can not be operated on a riser today because the vectoring algorithm can not work between the involved DPUs because a control connection is missing. Using SFUs that are trend-setting for FTTH migration, as modular and installable only when needed, does not allow the use of G.Fast and Vectoring / Supervectoring in the same cable, as the control connection for controlling the ports is vectoring / supervervoing or G.Fast is missing.

The publication DE 10 2006 061 722 A1 describes a connection module and a method for producing a connection module for electrically contacting an optoelectronic module.

The publication DE 103 19 900 A1 describes an opto-electronic transmission / reception arrangement with a coupling part for receiving and coupling an optical fiber.

The publication US 8,805,207 B2 describes a disturbance compensator for selectively compensating for linear and nonlinear waveform distortions acting on an optical signal.

The publication EP 2 495 889 A1 describes a predistortion optical transmitter and a predistortion optical fiber transmission system.

It is the object of the present invention to provide a concept for flexible migration of G.Fast to FTTH.

This object is solved by the features of the independent claims. Advantageous forms of further education are the subject of the dependent claims.

The invention presented here solves the problem of rigid DPU topology by the use of single port fiber units (SFU), which represent a single-port DPU and in connection with a rack, a flexible adaptation of the number of ports to the needs and in connection with an upstream PON Splitter enables flexible demand-driven migration of the individual ports from G.Fast/xVDSL (x = VDSL2, Vectoring, SuperVectoring) to PON. This means that from the point of view of PON, SFUs and FTTH only ever port one customer port. This allows a 1: 1 relationship between PON port and customer port regardless of whether it is a PON or G.Fast/xVDSL port. By registering the SFU with the Vectoring Proxy, the Activation of the vectoring function is possible even if several SFUs are to be operated within one cable. The automatic recognition of the SFU combined with the authorization on the vectoring master enables a completely automated operation. As a result, the SFU, for example, reports via its factory code (serial NR barcode, etc.) and after the vectoring proxy has been released, the communication between the SFUs takes place exclusively via the proxy. This provides efficient and fast control that is important to the vectoring process.

The communication between the SFU and the vectoring proxy should be via a suitable medium (e.g., wired or wireless) and the control between SFU and Porxy becomes active when used between at least two SFUs. The proxy in the rack is powered by the RPF (Reverse Power Feeding) feature of the first inserted SFU. A further power sharing after plugging in additional SFUs is possible.

This makes it possible to migrate buildings of different sizes because the approach allows the node size to be modularly extended.

Thus, the invention offers the following advantages: It is possible to dispense with a system level vectoring unit (SLV) at the locality, since this function is realized either via the vectoring proxy or the master at the OLT node level vectoring. An error correction procedure can also be used when using an SFU to eliminate NEXT / FEXT etc. It is possible to reduce the computing power in the access network (AN), as only there a correction takes place where other SFUs are active in the network. Individual customer requests (FTTB -> FTTH) can be considered very flexibly without any interaction with other customers. The hardware costs of the infrastructure can be significantly reduced because there are fewer or no unconnected ports in the network. Simple power management is possible because each CPE only supplies its own SFU.

BNG:

Broadband Network Gateway bzw. Breitbandnetzwerk-Gateway

CPE:

Customer Premise Equipment bzw. Teilnehmeranschlusseinheit

CuDa:

Kupfer Doppelader

EMS:

Element Management System

FTTB:

Fiber To The Building bzw. Glasfaser bis zum Gebäude

FTTH:

Fiber To The Home bzw. Glasfaser bis zum Haus

OLT:

Optical Line Termination; bzw. Optische Leitungsabschlussentität

ONT:

Optical Network Termination; bzw. Optischer Netzwerkabschluss

SFU:

Single Fiber Unit; bzw. Einzel-Glasfasereinheit oder auch Glasfaseranschlussmodul

SLV:

System Level Vectoring; bzw. Kompensation gegen Kanalübersprechen, insbesondere FEXT und NEXT

FEXT:

Far End Cross Talk bzw. Übersprechen am fernen Ende

NEXT:

Near End Cross Talk bzw. Übersprechen am nahen Ende

RG:

Residential Gateway bzw. stationäres Gateway

RPF:

Reverse Power Feeding bzw. Rückwärtige Leistungseinspeisung

Gf:

Glasfaser

To describe the invention, the following abbreviations are used:

BNG:

Broadband Network Gateway or Broadband Network Gateway

CPE:

Customer Premise Equipment or subscriber line unit

CuDa:

Copper double core

EMS:

Element Management System

FTTB:

Fiber to the building or fiber to the building

FTTH:

Fiber To The Home or fiber to the house

OLT:

Optical Line Termination; or optical line termination entity

ONT:

Optical Network Termination; or optical network termination

SFU:

Single fiber unit; or single fiber optic unit or fiber optic connection module

SLV:

System level vectoring; or compensation against channel crosstalk, in particular FEXT and NEXT

FEXT:

Far end cross talk or crosstalk at the far end

NEXT:

Near End Cross talk or crosstalk at the near end

RG:

Residential gateway or stationary gateway

RPF:

Reverse power feeding

gf:

glass fiber

The methods and systems presented below may be of various types. The individual elements described may be realized by hardware or software components, for example electronic components that can be manufactured by various technologies and include, for example, semiconductor chips, ASICs, microprocessors, digital signal processors, integrated electrical circuits, electro-optical circuits and / or passive components.

The methods and systems presented below can be used for communicating in master-slave systems or based on a master-slave architecture. Master / Slave (English for higher-level / lower-level system) is a form of hierarchical management of access to a common resource, usually in the form of a common data channel in numerous problems of control and regulation. One participant is the master, all others are the slaves. The master is the only one who has the right to access the common resource without being asked. The slave can not access the shared resource on its own; he has to wait until he is asked by the master.

The methods and systems presented below may include passive optical networks (PON), eg GPON, XG-PON, NG-PON2, EPON ... networks. Passive optical networks, also known as optical access networks (OAN), work exclusively with passive optical Components. PONs form the basis for the hybrid access networks (OAN), they are built in tree topology, directly connected to the core network and have branches as optical distribution networks (ODN). PON technology is available in a wide variety of variants and implementations, including the Broadband Passive Optical Network (BPON), which has a transmission rate of 622 Mbps. An increase to 1 Gbit / s can be achieved with the Ethernet Passive Optical Network (EPON) and with the Gigabit PON (GPON) even transfer rates of 2.5 Gbit / s. The 10 Gigabit Ethernet PON, 10GEPON, opens the 10 Gigabit Ethernet connectivity area. Standard PONs are also available as next-generation networks, such as NG-PON and NG-GPON.

In the PON concept, different subscribers can be connected via a fiber optic cable to an access switching office where various services, e.g. Language, video, data are provided. The participants are connected via a splitter to the optical line termination (OLT). The available bandwidth is divided among the number of possible subscribers, for example 32, and is 32: 1 or even 64: 1. The extent of such a passive optical network can be about 20 km.

The methods and systems presented below may include FTTN and FTTC components. FTTN (Fiber To The Node or Fiber To The Neighborhood) or FTTC (Fiber To The Curb) is the laying of fiber optic cables to the nearest splitter, the splitter. Here, accordingly, the so-called main cables of copper are upgraded to fiberglass or supplemented by fiber optic cable. The FTTN technique, like all other FTTL techniques, is a fiber optic connection technique in which the fiber is routed in the connection area between the local exchange and the switchboard. There, a signal conversion takes place via the Optical Network Unit (ONU) and further transmission to the subscriber line via copper cable. The bridgeable distance is about 500 m; the data rate is in the upstream between 2 Mbit / s and 12 Mbit / s and in the downstream between 25 Mbit / s and 52 Mbit / s.

According to a first aspect, the invention relates to an optical network entity for receiving an optical signal, comprising: a plurality of optical fiber connection modules for converting a plurality of optical signals into electrical signals; and a control module, each fiber access module having a predistorter for pre-distorting the electrical signal to compensate for channel crosstalk, wherein each fiber connection module is electrically detachably connectable to the optical network entity, the control module being configured in response to an electrical connection of a fiber optic interface module to the optical Network Entity network to detect the fiber optic module and transmit the detected fiber connection module Vorverzerrungskoeffizienten, and wherein the predistorter is designed to pre-distort the electrical signal by means of the transmitted Vorverzerrungskoeffizienten.

This has the advantage that the compensation for channel crosstalk can be flexible, depending on how many fiber-optic connection modules are currently active in the optical network entity. When a fiber optic module is powered up, such as by turning on the power or plugging it into a rack, the fiber optic module is detected and the predistortion is adjusted by the controller module to accommodate FEXT, NEXT crosstalk due to the fiber module being activated. This allows flexible connection and disconnection of fiber optic connection modules without disrupting the entire system. A connection, for example, by a new subscriber, a shutdown, for example, by porting a subscriber connection from electrical to optical (FTTB or FTTH). Thus, a flexible migration from G.Fast/xVDSL to FTTH becomes possible.

In one embodiment of the optical network entity, the predistorter is configured to compensate the electrical signal for near end crosstalk (NEXT) and / or far end crosstalk (FEXT).

This has the advantage that the control module can provide distortion coefficients that effectively compensate for NEXT and FEXT. The overall system is not adversely affected when a subscriber is rearranged on the system, e.g. by migration of G.Fast to FTTH.

In one embodiment of the optical network entity, the control module is configured to calculate the predistortion coefficients depending on a number of detected fiber connection modules.

This has the advantage that the predistortion control module can take into account the electrical (crosstalk) signals of all active fiber access modules to provide optimum predistortion for all electrical signals.

In one embodiment of the optical network entity, the control module interfaces with an optical terminator entity configured to transmit a message via the detected fiber termination module to the optical terminator entity and to receive the predistortion coefficients from the optical terminator entity.

This has the advantage that the control module does not have to determine the predistortion coefficients on its own, but that these can be determined in the optical line termination entity and can be transmitted via the interface to the control module. Thus, the control module can be made lean, and computing capacity for detecting the predistorter coefficients can be held in the optical line termination entity instead of the optical network entity (in the control module).

In one embodiment of the optical network entity, the message comprises an identification of the detected fiber access module.

This has the advantage that the message enables the activated fiber termination module to be communicated to the optical termination entity so that it can authenticate the fiber termination module. Further, the optical line termination entity thus has a close overview of the system's currently active components and the overall state of the system.

In one embodiment, the optical network entity further comprises an optical splitter configured to receive the optical signal and split it into the plurality of optical signals.

This has the advantage that the optical signal from the optical line termination entity can be distributed to the individual fiber access modules so that only one optical signal needs to be transmitted to the optical network entity. For example, the splitter can be implemented as a PON splitter so that the optical network entity can process optical signals from PON networks and convert them into electrical signals.

In one embodiment, the optical network entity further comprises a rack into which the respective fiber connector modules are insertable, and the control module is configured to detect the respective fiber connection module in response to insertion of a respective fiber connector module into the rack.

This has the advantage that the optical network entity can be made compact and suitable for being placed at the subscriber, for example in an apartment building with a fiber optic connection, from which the optical network entity then the corresponding electrical and / or optional optical for all households in the house Signal generated to connect the households of the apartment building to the Internet.

In one embodiment of the optical network entity, each fiber access module has a subscriber-side port configured to transmit the corresponding electrical signal to a subscriber line; and each fiber-optic module is powered from the subscriber-side port as soon as the fiber-optic connector module is plugged into the rack and connected to and powered by the customer's connector.

This has the advantage that the fiber optic connection module does not require its own power supply and thus can be made compact. At the same time, data can be transmitted to the subscriber via the subscriber-side port, and the fiber-optic connection module can be supplied with power.

In one embodiment, the optical network entity further comprises a power control module electrically connectable to the respective fiber access modules and configured to power the rack and the control module via at least one of the fiber optic port modules plugged into the rack.

This has the advantage that the rack with fiber optic connection modules does not require its own power supply and thus can be made compact. All components of the rack can be connected via the electrical line or copper line directly from the subscriber line, e.g. the subscriber G.fast/xVDSL modem or the home gateway, are powered electrically. The corresponding control can be done by the control module, for example via RPF (Reverse Power Feeding). Of course, the controller module can also power the rack in a manner other than RPF, such as through a power supply installed in the rack or in each fiber-optic interface module.

According to a second aspect, the invention relates to a glass fiber termination module for converting an optical signal into an electrical signal, comprising: an optical port for receiving the optical signal; a processor configured to convert the received optical signal into an electrical signal; a predistorter configured to pre-distort the electrical signal to crosstalk a channel compensate; and an interface to a control module configured to convey predistortion coefficients to the predistorter, and the predistorter is configured to predistort the electrical signal by means of the transmitted predistortion coefficients.

This has the advantage that the compensation for channel cross-talk can be made flexibly, depending on where the fiber-optic connection module is currently being used. Upon activation of the fiber module, for example, by turning on the power supply, the fiber termination module is detected and the predistortion adjusted accordingly to accommodate crosstalk through FEXT, NEXT that can occur on the electrical line. This allows the fiber optic interface module to be flexibly connected and disconnected to other fiber access modules without interfering with the interconnect. The fiber optic connection module can be flexibly assigned to each individual subscriber who, for example, wishes to change from a previous connection system in conjunction with other subscribers to a single connection. Thus, a flexible migration from G.Fast/xVDSL to FTTH becomes possible.

In one embodiment of the fiber termination module, the optical port includes a PON backhaul module.

This has the advantage that the optical fiber connection module can process optical signals from PON networks and convert them into electrical signals. The individual fiber optic connection module can thus be efficiently and inexpensively coupled to a PON network.

In one embodiment of the fiber termination module, the processor is configured to generate the electrical signal from the optical signal according to a G.Fast or xVDSL protocol.

This has the advantage that the previously common G.Fast and xVDSL protocols, which are based on electrical connection lines, are supported by the fiber optic connection module.

In an embodiment of the optical fiber connection module, the interface to the control module is further configured to transmit an identification of the glass fiber connection module to the control module.

This has the advantage that the identification of the fiber-optic port module can be communicated to the optical terminator entity so that it can authenticate the fiber-optic port module. Further, the optical line termination entity thus has a close overview of the system's currently active components and the overall state of the system.

According to a third aspect, the invention relates to a communication system comprising: an optical line termination entity for providing an optical signal; an optical network entity according to the first aspect or one of its embodiments for converting the optical signal into an electrical signal; and / or a fiber-optic connection module according to the second aspect or one of its embodiments for converting the optical signal into an electrical signal, wherein the optical line termination entity is adapted to transmit predistortion coefficients to the optical fiber connection module.

This has the advantage that the compensation for channel cross-talk can be made flexibly, depending on how many fiber-optic connection modules are currently active in the communication system. The communication system always has an overview of the optical network entities and individual fiber optic connection modules and can thus optimally determine the compensation for channel crosstalk. Optical network entities and fiber optic connection modules can be flexibly connected and disconnected without disrupting the entire system. A connection, for example, by a new subscriber, a shutdown, for example, by porting a subscriber connection from electrical to optical (FTTB or FTTH). Thus, a flexible migration from G.Fast to FTTH becomes possible.

In one embodiment of the communication system, the optical line termination entity is configured to detect an identification of the fiber access module and to transmit the predistortion coefficients depending on the identification of the fiber access module.

This has the advantage that the identification of the fiber access module can be communicated to the optical terminator entity so that it can authenticate the fiber access module and assign the optimal predistortion coefficients to the respective fiber access module. Further, the optical line termination entity thus has a close overview of the system's currently active components and the overall state of the system.

• 1 eine schematische Darstellung der Topologie eines Breitbandzugangsnetzwerks 100;
• 2 eine schematische Darstellung eines Breitbandzugangsnetzwerks 200 mit in einem Rack untergebrachter optischer Netzwerkentität 301 gemäß einer Ausführungsform;
• 3 eine schematische Darstellung des Breitbandzugangsnetzwerks 200 aus 2 mit Detail-Darstellung der optischer Netzwerkentität 301 gemäß einer Ausführungsform;
• 4 eine schematische Darstellung der Nachrichtensequenzen 400 in dem Breitbandzugangsnetzwerks 200 aus 2 gemäß einer ersten Ausführungsform;
• 5 eine schematische Darstellung der Nachrichtensequenzen 500 in dem Breitbandzugangsnetzwerks 200 aus 2 gemäß einer zweiten Ausführungsform; und
• 6 eine schematische Darstellung der Nachrichtensequenzen 600 in einem Breitbandzugangsnetzwerk 200 mit einem einzelnen Glasfaseranschlussmodul 310 gemäß einer Ausführungsform.

Further embodiments will be explained with reference to the accompanying drawings. Show it:

• 1 a schematic representation of the topology of a broadband access network 100;
• 2 a schematic representation of a broadband access network 200 in a Rack of accommodated optical network entity 301 according to one embodiment;
• 3 a schematic representation of the broadband access network 200 from 2 detailing the optical network entity 301 according to one embodiment;
• 4 a schematic representation of the message sequences 400 in the broadband access network 200 from 2 according to a first embodiment;
• 5 a schematic representation of the message sequences 500 in the broadband access network 200 from 2 according to a second embodiment; and
• 6 a schematic representation of the message sequences 600 in a broadband access network 200 with a single fiber connection module 310 according to one embodiment.

In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. It should be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the concept of the present invention. The following detailed description is therefore not to be understood in a limiting sense. Further, it should be understood that the features of the various embodiments described herein may be combined with each other unless specifically stated otherwise.

Aspects and embodiments will be described with reference to the drawings, wherein like reference numerals generally refer to like elements. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more aspects of the invention. However, it will be apparent to one skilled in the art that one or more aspects or embodiments may be practiced with a lesser degree of specific details. In other instances, well-known structures and elements are shown in schematic form to facilitate describing one or more aspects or embodiments. It is understood that other embodiments may be utilized and structural or logical changes may be made without departing from the concept of the present invention.

Furthermore, while a particular feature or aspect of an embodiment may have been disclosed in terms of only one of several implementations, such feature or aspect may be combined with one or more other features or aspects of the other implementations, as for a given or particular one Application may be desirable and advantageous. Furthermore, to the extent that the terms "contain," "have," "with," or other variants thereof are used in either the detailed description or the claims, such terms are intended to include such terms in a manner similar to the term "comprising." The terms "coupled" and "connected" may have been used along with derivatives thereof. It should be understood that such terms are used to indicate that two elements independently cooperate or interact with each other, whether they are in direct physical or electrical contact or are not in direct contact with each other. In addition, the term "exemplary" is to be considered as an example only, rather than the term for the best or optimal. The following description is therefore not to be understood in a limiting sense.

2 shows a schematic representation of a broadband access network 200 with optical network entity housed in a rack 301 for receiving an optical signal 302 according to one embodiment.

The optical network entity comprises a plurality of optical fiber connection modules 310, 320, 330, a control module 303 and an optical splitter 305 , The optical splitter 305 is designed to be the optical signal 302 to receive and into a plurality of optical signals 304 splitting, via optical branch lines to the fiber optic connection modules 310 . 320 . 330 be guided. The optical splitter is for example a passive optical splitter, eg a PON (passive optical network) splitter.

The fiber optic connection modules 310 . 320 . 330 are designed to receive the plurality of optical signals 304 into electrical signals 308 . 318 implement, with each fiber connector module 310 . 320 . 330 a corresponding electrical signal 308 . 318 can generate. Each fiber connection module 310 . 320 . 330 has a predistorter 311 for predistorting the respective electrical signal 308 . 318 on to compensate for a channel crosstalk. Each fiber connection module 310 . 320 . 330 is with the optical network entity 301 electrically detachable connectable.

The control module 303 is adapted to be responsive to an electrical connection of a fiber optic interface module 310 . 320 . 330 with the optical network entity 301 the fiber optic connection module 310 . 320 . 330 to detect and the detected fiber connection module 310 . 320 . 330 predistortion 306 to convey. The predistorter 311 is adapted to the respective electrical signal 308, 318 by means of the transmitted predistortion coefficients 306 pre-distort.

The predistorter 311 can the electrical signal 308 . 318 For example, against near-end crosstalk ( NEXT ) and / or far-end crosstalk ( FEXT ) compensate.

The control module 303 can the predistortion coefficients 306 depending on a number of detected fiber optic connection modules 310 . 320 . 330 to calculate. Depending on how much fiber connection modules 310 . 320 . 330 emit electric signals, the disturbance changes on the electric line, so that the Vorverzerrungskoeffizienten should be changed accordingly.

The optical network entity 301 may have a rack into which the respective fiber optic connector modules 310 . 320 . 330 are pluggable. The control module 303 may be responsive to insertion of a respective fiber connector module 310 , 320, 330 in the rack the respective fiber optic connection module 310 . 320 . 330 detect.

Each fiber connection module 310 . 320 . 330 may have a subscriber-side port to the corresponding electrical signal 308 . 318 to a local loop 315 . 325 to convey. Each fiber connection module 310 . 320 , 330 can be powered via the subscriber's port as soon as the fiber optic connection module 310 . 320 . 330 plugged into the rack.

The following is an exemplary implementation of broadband access network 200. The single ones SFU Modules 310, 320, 330 are in a rack 301 accommodated. The rack 301 In addition to the mechanical mounting of the SFU modules also includes the electrical contact for SFU and also the vectoring proxy function, which is the login of the SFU Modules on the rack as well as the control of the SFUs among themselves as well as the control over the Vectoring master function carries out. There is a splitter on the rack itself 305 who made a flexible switch between the G.Fast SFU 310, 320, 330 and FTTH ONT 312 allows.

The splinter 305 is visually with the OLT 103 and connects to PON tree 304. From the perspective of OLT behaves the SFU through the built-in ONT with the PON backhaul function 409a . 409b . 409c (please refer 3 ) as a FTTH Connection, so when changing from FTTB 308 too FTTH 328 only a change of splitter is necessary. The login procedure at PON is done via OMCI standard functions.

Alternatively, a realization without rack can take place (see 6 ) by eliminating the vectoring proxy function and the vectoring slave function SFU directly with the vectoring master function in OLT communicated. The master vectoring function recognizes the SFU automatically or has this information already available from the PON topology.

3 shows a schematic representation of the broadband access network 200 out 2 with detail representation of the optical network entity 301 according to one embodiment.

The control module 303 can be an interface 402 to an optical line termination entity 103 to receive a message about the detected fiber termination module 310 . 320 . 330 to the optical line termination entity 103 and from the optical line termination entity 103 the predistortion coefficients 306 to recieve. The message may, for example, be an identification of the detected fiber connection module 310 . 320 . 330 include.

The optical network entity 301 may further comprise a power control module 405 electrically connected to the respective fiber optic connection modules 310 . 320 . 330 can be coupled, and the rack and the control module 303 via at least one of the fiber-optic connection modules plugged into the rack 310 . 320 . 330 can supply electricity. The power control module 405 can be via one or more of the electrical wires 408a . 408b . 408c to the corresponding fiber optic connection modules 310 . 320 , 330 are powered. If the 310, 320, 330 fiber optic connector module is plugged into the rack, the fiber optic connector module may be used 310 . 320 . 330 power the rack with the local loop.

The optical splitter 305 splits the received optical signal 302 into the plurality of optical signals 304a, 304b, 304c which are connected to the respective optical ports 409a , 409b, 409c of the corresponding fiber optic connector modules 310 . 320 . 330 to get redirected.

The control module 303 is via appropriate electrical lines 306a . 306b , 306c with the respective predistorters 311 . 311b . 311c connected to transmit the predistorter coefficients.

The fiber optic connection modules 310 . 320 . 330 can also be operated without a rack.

The fiber optic connection module 310 that of converting an optical signal 304a into an electrical signal 308 serves, includes an optical port 409a for receiving the optical signal 304a; a processor 407a configured to convert the received optical signal 304a into an electrical signal 308 implement; a predistorter 311 which is formed, the electrical signal 308 pre-distort to compensate for channel crosstalk; and an interface to a control module, such as a control module 303 in the optical network entity 301 or a control module 401 in the optical line termination entity. The interface is designed to be the predistorter 311 predistortion 306a to convey. The predistorter 311 is designed to receive the electrical signal 308 by means of the transmitted predistortion coefficients 306a pre-distort.

The optical connection 409a may include, for example, a PON backhaul module. The processor 407a can be designed to handle the electrical signal 308 according to a G.Fast or xVDSL protocol from the optical signal 304a. The interface to the control module 303 . 401 may further be adapted to the control module 303 . 401 an identification of the fiber optic connection module 310 to convey.

The broadband access network 200 forms a communication system 200 with an optical line termination entity 103 for providing an optical signal 302 ; an optical network entity 301 for converting the optical signal into an electrical signal; and / or a fiber optic connection module 310 for converting the optical signal into an electrical signal, wherein the optical line terminating entity 103 is adapted to the optical fiber connection module 310 Predistortion coefficients 306 to transmit.

The optical line termination entity 103 may be designed to provide identification of the fiber optic interface module 310 and the predistortion coefficients 306 depending on the identification of the fiber optic port module 310 to convey.

each SFU consists of the main modules PON Backhaul Function (12), the G.Fast/xVDSL Port Function (13) and the Vectoring Slave Function (11). As soon as that SFU Module in the SFU Rack is pushed, connects the SFU optically and electrically with the rack. As each SFU Module via (3) is powered ( RPF ) it works independently and does not require a central power supply. The rack itself does not require any local power supply, as it has over the RPF Control (10) with power from the SFU 1..n is powered as soon as at least one SFU electrical contact (9) with the RPF Control has. In addition, the vectoring slave function (11) receives contact (8) with the vectoring proxy function (14). This feature can be the SFU Receive login and process locally if the SFU to be enrolled is known, or forward this information (15) to the vectoring master function that is enrolling in the system.

The following is an exemplary implementation of broadband access network 200. each SFU 310 . 320 . 330 consists of the main modules PON backhaul function 409a . 409b . 409c , the G.Fast/xVDSL port function 407a . 407b , 407c as well as the Vectoring Slave function 311 . 311b . 311c , As soon as that SFU Module 310, 320, 330 in the SFU Rack 301 is pushed, connects the SFU optically and electrically with the rack. As each SFU Module via the connecting cables 308 , 318 is powered ( RPF ) it works independently and does not require a central power supply. The rack itself does not require any local power supply, as it has over the RPF Control 405 from the SFUs 310 . 320 . 330 is powered as soon as at least one SFU electrical contact 408a . 408b . 408c with the RPF Control has. In addition, the Vectoring receives slave function 311 . 311b . 311c Contact 306a, 306b, 306c with the Vectoring Proxy function 303 , This feature can be the SFU Receive registration and process locally if the to be registered SFU is known or she passes this information 402 to the vectoring master function 401 which logs on to the system.

4 shows a schematic representation of the message sequences 400 in the broadband access network 200 out 2 according to a first embodiment.

After plugging in the fiber-optic connection module 310 into the optical network entity 301, or into the rack, the messages described below can be exchanged. The fiber optic connection module 310 sends a message "SFU Start Up Request" 501 to the optical network entity 301 or the rack, which is answered by a message "SFU Start Ack" 502. The fiber optic connection module 310 is thus inserted in the rack and ready for use. Afterwards the fiber optic connection module sends 310 a message "SFU Auth request" 503 to the optical network entity 301 or the rack, which is answered by a message "SFU Auth Ack" 504. The fiber optic connection module 310 is thus authenticated. Afterwards the fiber optic connection module sends 310 a message "SFU vectoring request" 505 to the optical network entity 301 or the rack, which is indicated by a message "SFU Vectoring Ack "506 is answered. The fiber optic connection module 310 is thus taken into account in the vectoring method, ie compensation method against channel crosstalk, and the distortion coefficients are adapted accordingly.

Upon receiving the message "SFU Auth request" 503, the optical network entity 301 in turn sends the message "SFU Auth request" 511 to the line terminator entity 103 which responds with the message "SFU Auth Ack" 512 if the Fiber Optic Interface Module 310 the authentication is granted. In the same way, the optical network entity sends 301 in turn, after receiving the message "SFU vectoring request" 505, forward the message "SFU vectoring request" 513 to the line terminating entity 103 which responds with the message "SFU Vectoring Ack" 514 if the Fiber Optic Interface Module 310 Access to the predistortion compensation or the vectoring method is granted.

Upon receiving the message "SFU Auth request" 511, the line terminator entity 103 sends the message "Inventory Request" 521 to the element management system 531, which is in its control module 533 Check if the fiber connector module 310 is entitled to access and, if checked, responds with the message "Inventory Response" 522. In response to the message "Inventory Response" 522, the message "SFU Auth Ack" 512 in the line terminator entity becomes 103 and, in response, generates the message "SFU Auth Ack" 504 in the optical network entity 301 ,

Upon positive completion of the above-described message sequences, the vectoring process 507 between the optical network entity 301 and the fiber connection module 310 initialized.

The following is an example implementation of the message sequence 400 shown. As soon as the SFU 310, 320, 330 electrical contact to SFU rack 301 has and the vectoring proxy function 303 about the RPF Control 405 feeds, begins SFU Vectoring slave function 311 . 311b . 311c a "SFU Start Up request" 501 for the vectoring proxy function 303 to send the Vectoring Proxy function 303 always with a SFU Start Acknowledge 502 acknowledged. Then the vectoring slave function starts 311 . 311b . 311c one SFU Authentication Request 503 to the vectoring proxy function 303 who may check this request and to the vectoring master function 401 forwards. This puts this message in an Inventory Request 521 um, and ask at the inventory control system 533 of EMS 531 after, whether the SFU is known. The inventory data of the to be registered SFU should previously be the inventory control system 531 have been communicated via configuration or by bar code scan and mobile transmission. Is the SFU is known, the authentication by acknowledgment messages 522 . 512 . 504 the vectoring slave function 311 . 311b . 311c communicated. As soon as the SFU is successfully authenticated, it starts with the vectoring proxy function 303 the vectoring 507 ,

Depending on the type of vectoring, a distinction is made between system level vectoring ( SLV ) and Board Level Vectoring (BLV). Since vectoring is the exchange of control information between independent SFUs, the principle of system level vectoring is used here. It can SLV either between SFU 310, 320, 330 and SFU rack 301 or SFU 310 . 320 . 330 and OLT 103 occur 607.

5 shows a schematic representation of the message sequences 500 in the broadband access network 200 out 2 according to a second embodiment.

The news sequences 500 match the ones above 4 described message sequences 400 , However, upon positive completion of the above-described message sequences, the vectoring process 608 will be between the line termination entity 103 and the fiber connection module 310 initialized.

6 shows a schematic representation of the message sequences 600 in a broadband access network 200 with a single fiber connection module 310 according to one embodiment.

After switching on the fiber-optic connection module 310 to the electrical power supply, the messages described below can be exchanged. The fiber optic connection module 310 sends a message "SFU Start Up Request" 501 to the Optical Termination Entity 103 which is answered by a message "SFU Start Ack" 502. The fiber optic connection module 310 is ready for use. Afterwards the fiber optic connection module sends 310 a message "SFU Auth request" 503 to the optical terminator entity 103 which is answered by a message "SFU Auth Ack" 504. The fiber optic connection module 310 is thus authenticated. Afterwards the fiber optic connection module sends 310 a message "SFU vectoring request" 505 to the optical terminator entity 103 which is answered by a message "SFU Vectoring Ack" 506. The fiber-optic connection module 310 is thus taken into account in the vectoring method, ie compensation method for channel crosstalk, and the distortion coefficients are adapted accordingly.

Upon receiving the message "SFU Auth request" 503, the line terminator entity 103 sends the message "Inventory Request" 521 to the element management system 531, which is in its control module 533 Check if the fiber connector module 310 is entitled to access, and upon positive verification, responds with the message "Inventory Response" 522. In response to the message "Inventory Response" 522, the message "SFU Auth Ack" 504 in the line terminator entity becomes 103 generated and to the fiber optic connection module 310 Posted.

Upon positive completion of the above-described message sequences, the vectoring process 507 between the line termination entity 103 and the fiber connection module 310 initialized.

One aspect of the invention also includes a computer program product that may be loaded directly into the internal memory of a digital computer and includes software code portions that correspond to the 5 to 7 described method can be performed when the product is running on a computer. The computer program product may be stored on a computer-suitable medium and comprise computer-readable program means which cause a computer to be linked to the computer 5 to 7 to carry out the described method.

The computer may be a PC, for example a PC of a computer network. The computer may be implemented as a chip, an ASIC, a microprocessor or a signal processor and may be located in a computer network, a WAN or in a cloud.

It is to be understood that the features of the various embodiments described herein by way of example may be combined with each other except as specifically stated otherwise. As shown in the specification and drawings, individual elements that have been shown to be related need not communicate directly with each other; Intermediate elements may be provided between the connected elements. Further, it is to be understood that embodiments of the invention may be implemented in discrete circuits, partially integrated circuits, or fully integrated circuits or programming means. The term "for example" is meant as an example only and not as the best or optimal. While particular embodiments have been illustrated and described herein, it will be apparent to those skilled in the art that a variety of alternative and / or similar implementations may be practiced instead of the illustrated and described embodiments without departing from the concept of the present invention.

LIST OF REFERENCE NUMBERS

100:

Broadband access network according to ITU-T G.9701

101:

BRAS / BNG

102:

Aggregation Network

103:

optical line termination entity or OLT

104:

optical network entity or ONU / ONT

105:

stationary gateway, home network gateway

200:

Broadband access network according to one embodiment

302:

optical signal

303:

Control module or vectoring proxy function

304:

branched plurality of optical signals

305:

optical splitter, PON splitter

306:

predistortion

308:

electrical signal on subscriber line

318:

electrical signal on subscriber line

328:

optical signal on subscriber line

315:

G.Fast or xVDSL unit, G.Fast or xVDSL modem

325:

G.Fast or xVDSL unit, G.Fast or xVDSL modem

335:

optical network termination, ONT

317:

stationary gateway, residential gateway

311, 311a, 311b, 311c:

Predistorter or vectoring slave function

306, 306a, 306b, 306c:

Predistortion coefficients or interfaces between vectoring proxy and vectoring slave for transmitting the predistortion coefficients

313:

GEM port or optical port on the fiber optic connection module

310, 320, 330:

Fiber optic connection modules or SFUs, Single Fiber Units

301:

optical network entity or rack with SFUs or ONU / ONT

312:

FTTH ONT

400:

Broadband access network presenting the message sequences according to one embodiment

401:

Control module in the optical line termination entity or vectoring master in the OLT

405:

Power control module in optical network entity or RPF Control in SFU rack

402:

Interface to the optical line termination entity

407a, 407b, 407c:

electrical port or G.Fast or xVDSL port

409a, 409b, 409c:

optical port on the guest fiber connection module or PON Backhaul on the SFU

408a, 408b, 408c:

electrical lines between power control module 405 and fiber optic connection modules

500:

Broadband access network presenting the message sequences according to one embodiment

501:

SFU Start Up request, registration of the SFU

502:

SFU Start Ack, acknowledgment via registration

503, 511:

SFU Authentication request, request for authentication of the SFU

504, 512:

SFU Auth Ack, acknowledgment of authentication

505, 513:

SFU vectoring request, request for transfer of the equalizer coefficients

506, 514:

SFU Vectoring Ack, acknowledgment of the request for equalizer coefficients

507, 607, 707:

Vectoring method or compensation against channel crosstalk

521:

Inventory request, request for inventory data

522:

Inventory response, acknowledgment via inventory data

531:

Element Management System, EMS

533:

Inventory control system

600:

Broadband access network presenting the message sequences according to one embodiment

Claims (15)

An optical network entity (301) for receiving an optical signal (302), comprising: a plurality of fiber access modules (310, 320, 330) for converting a plurality of optical signals (304) into electrical signals (308, 318); and a control module (303), wherein each fiber termination module (310, 320, 330) includes a predistorter (311) for predistorting the electrical signal (308, 318) to compensate for channel crosstalk, wherein each optical fiber connection module (310, 320, 330) is connectable to the optical network entity (301) via electrical contacts, wherein the control module (303) is adapted to detect the fiber termination module (310, 320, 330) in response to an electrical connection of a fiber termination module (310, 320, 330) to the optical network entity (301) and to the detected fiber termination module (310, 320, 330) predistortion coefficients (306), and wherein the predistorter (311) is adapted to predistort the electrical signal (308, 318) by means of the transmitted predistortion coefficients (306). Optical network entity (301) after Claim 1 wherein the predistorter (311) is adapted to compensate the electrical signal (308, 318) for near end crosstalk (NEXT) and / or far end crosstalk (FEXT). Optical network entity (301) after Claim 1 or 2 wherein the control module (303) is configured to calculate the predistortion coefficients (306) in dependence on a number of detected fiber connection modules (310, 320, 330). Optical network entity (301) after Claim 1 or 2 wherein the control module (303) has an interface (402) to an optical terminator entity (103) configured to transmit a message via the detected fiber termination module (310, 320, 330) to the optical terminator entity (103) and from the optical line termination entity (103) to receive the predistortion coefficients (306). Optical network entity (301) after Claim 4 wherein the message comprises an identification of the detected fiber access module (310, 320, 330). An optical network entity (301) according to any one of the preceding claims, further comprising: an optical splitter (305) configured to receive and split the optical signal (302) into the plurality of optical signals (304). An optical network entity (301) according to any one of the preceding claims, further comprising: a rack into which the respective fiber optic connection modules (310, 320, 330) can be inserted, wherein the control module (303) is configured to detect the respective fiber termination module (310, 320, 330) in response to an insertion of a respective fiber access module (310, 320, 330) into the rack. Optical network entity (301) after Claim 7 wherein each fiber termination module (310, 320, 330) includes a subscriber side port configured to transmit the respective electrical signal (308, 318) to a subscriber line (315, 325); and wherein each fiber termination module (310, 320, 330) is powered by the subscriber side port as soon as the fiber termination module (310, 320, 330) is plugged into the rack. Optical network entity (301) after Claim 7 or 8th , further comprising: a power control module (405) electrically connectable to the respective fiber access modules (310, 320, 330), and configured to route the rack and control module (303) over at least one of the fiber optic port modules (310, 310) plugged into the rack; 320, 330) to supply power. Optical fiber connection module (310) for converting an optical signal (304a) into an electrical signal (308), comprising: an optical port (409a) for receiving the optical signal (304a); a processor (407a) configured to convert the received optical signal (304a) into an electrical signal (308); a predistorter (311a) configured to pre-distort the electrical signal (308) to compensate for channel crosstalk; and an interface to a control module (303, 401) adapted to transmit predistortion coefficients (306a) to the predistorter (311a), and wherein the predistorter (311a) is adapted to predistort the electrical signal (308) by means of the transmitted predistortion coefficients (306a). Fiber Optic Module (310) after Claim 10 wherein the optical port (409a) comprises a PON backhaul module. Fiber Optic Module (310) after Claim 10 or 11 wherein the processor (407a) is adapted to generate the electrical signal (308) from the optical signal (304a) according to a G.Fast or xVDSL protocol. Fiber optic connection module (310) according to one of the Claims 10 to 12 wherein the interface to the control module (303, 401) is further adapted to transmit to the control module (303, 401) an identification of the fiber access module (310). A communications system (200), comprising: an optical line termination entity (103) for providing an optical signal (302); an optical network entity (301) according to one of Claims 1 to 9 for converting the optical signal into an electrical signal; and / or an optical fiber connection module (310) according to one of Claims 10 to 13 for converting the optical signal into an electrical signal, wherein the optical line termination entity (103) is adapted to transmit predistortion coefficients (306) to the fiber termination module (310). Communication system (200) after Claim 14 wherein the optical line termination entity (103) is adapted to detect an identification of the fiber connection module (310) and to transmit the predistortion coefficients (306) depending on the identification of the fiber connection module (310).

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